Numerik uses a third party application for the Inbox and Feed functionality. This may require your IT Department to whitelist third party websites on your network.
If you find that your images are blocked or you are unable to access the Inbox or Feeds, then update your firewall rules to whitelist the following:
https://chat-proxy-singapore.stream-io-api.com
https://stream-cloud-uploads.imgix.net
https://stream-chat-singapore-c1.imgix.net
https://faye-us-east.stream-io-api.com